Excavating dipper



Jan. 2, 1940. w. M. BAGER El AL EXCAVATING DI PPER Filed Jan. 27, 1938 2 Sheets-Sheet 1 ATTORNEYS 1940- w. M. BAGER ET AL ,1 5,176

' EXCAVATING DIPPER v Filed Jan. 2?, 1938 2 Sheets-Sheet 2 INVI ZNTORS ATTORNEYS Patented Jan. 2, 1940 UNITED STATES PATENT OFFICE 1 I '2 2,185,176 V EXOAVATING DIPPER William' M. Bager, Fox Point, Mitchell L. Fykse and George W. Mork, South Milwaukee, Wis.,

assignors to'Bucyrus-Erie Company, South Milwaukee, Wis a corporation of Delaware Application January 27, 1938, Serial No. 187,208

' 13 Claims. (01. 214-145) Our invention relates to new and useful improvements inexcavating dippers.

Devices of this sort comprise a substantially cubical body, having a front, a back and two 5' sides, being open at top and bottom, and having a door-to close the bottom opening. The back is secured to the end of a handle, which is used to thrust the dipper 'into the material to be excavated. The frontupper edge constitutes the digging lip, usually equipped with teeth.- Means,

such as bail-'lugs',are provided for attachment 'of I I the hoist-rope.

' Various problems of construction, not heretofore adequately'solved, include: making the dipper sufliciently strong and rigid to carry the digging stresses from the lip to the handle and hoist rope, and yet at the same time sufliciently light to involve no unnecessary dead weighty building the different parts of the dipper, each of the best material'for the particular function to be performed by that part, and yet securing these parts together adequately and strongly; and so designing the parts that one given size of parts canbe utilized in building several different sizes 26- of dipper. It is the principle object of our invention to attain these ends.

In addition to ourprincipal object, above stated, we haveworked out a number of novel and useful details, which will be readily evident as the de- 30 scription progresses.

Our invention consists in the novel parts and v in the combination and arrangement thereof, which are defined in the'appended claims, and of which one embodiment is exemplified in the accompanying drawings, which are hereinafter particularly described and explained.

Throughout the description, the samereference number is applied to the same member or to similar members. 40 Figure 1 is a side elevation of our dipper, taken along the lines l-l of Figure 2, with handle Figure 6 is an end view of our plug, taken along the lines 66 of Figure 5.

Turning now to Figures 1 and 2,'we see that a? the body of our dipper is made up of a lip II, a

rear top casting I2, and a rear lower casting l3; the balance I being built up of structural plate. In the claims, lip II and rear top casting l2 will collectively be referred to as the upper cast rim, and rear lower casting l3 will be referred 6 to as the lower rear heel casting.

The lip casting H is preferably made of manganese steel, to withstand abrasion. A part of it constitutes the lip l5, and carries digging teeth I6. 10

. The upper rear casting I2 is preferably made of carbon steel, for cheapness and tensile strength. It preferably carries, as an integral part, two bail lugs I! for attaching the hoisting means. Its rear portion preferably contains box hollows I8 for combined strength and lightness. It also carries lugs [9, for support by the dipper handle 20.

The lower rear casting i3 is preferably made of carbon steel, for cheapness and tensile strength. 20 Its rear portion preferably contains box hollows 2l'for combined strength and lightness. It carries lugs 22, for support by the dipper handle 20, and to support the hinges 23 of the dipper door 24.

The plate portion I4 is built up of commercial :5

plate steel, cut and bent to fit, and attached to the three castings by bolts, or preferably rivets, as shown. Its back is reinforced by two or more channel pieces 25, welded in place.

Our two upper castings II and I2 are secured 30 together in the following manner, as shown in Figure 5. The back casting 12, being of a type of steel which renders this possible, is machined to a close fit, for the insertion of the cylindrical portion of plug 26. The front casting I I, being of 35 manganese steel, is cast with a rough core-hole, slightly largerthan the cylindrical portiomof the plug, and considerably larger than the tapered portion of the plug. The plug itself is cast with a recess 21, to avoid blow-holes. 1 40 In assembling the upper rim of the dipper each plug is inserted, the two portions of the rim, II and I2, are secured in surface contact with each other by a ring of bolts, or preferably rivets 28, I and against sliding apart, by the plug which is 4,5 welded to the front portion I I, as at 29.

This construction of the upper rim is as sturdy as if it were built all in one piece, and yet permits the use of two kinds of metal (one for lip and one for back, each the best for its own purpose), and also permits the size-change about to be discussed. The channels, welded to the plate back, serve as braces for the two levels of attachment to the handle.

Thus it is now possible to carry the digging 5 2 stressfrom the lip and teeth, to bail and handle,

through a minimum of metal, with the rest of' the dipper serving as a mere light bag to hold the excavated material.

Portions II and ii of the upper rim are built so that they can overlap to a greater or less degree. Thus, by properly locating the holes for the plugs, several alternate sizes of rim are thus available. .In the smaller sizes, the superfluous overlap of one or both 01" the parts can bebumt j oil. The structural plate portion of the dipper can be built to match; and also, if desired, can be made deeper or shallower in proportion. The

rear lower casting l3 presents no problems-in this connection.

If desired, the lugs I! can be and instead the holes 21 be bored clear through I both of the plugs 26, and two separate bail'elug sliding apart or prying apart; a digging lip on the front part of the rim; handle-attaching lugs on the rear part of the rim; hoist-means-attaching lugs on the rim; a lower rear hollow heel piece, extending clear across the rear lower edge of the dipper; handle-attaching lugs on this piece; the

balance of the dipper body being built of structural plate; and vertical reinforcing ribs on the back of the plate portion, extending from the heel piece to the rim.

'2. In an excavating dipper, the combination of: an up'per'cast rim in two parts, the front part being of manganese steel, and the rear part being of carbon 'steel; means for securing the two .parts of the rim together, against sliding apart or prying apart; a digging lip on the front part of the rim; handleeattaching lugs on the rear part of the rim; hoist-means-attaching lugs on the rim; a lower rear hollow heel piece; extending clear across the rear lower edge of the dipper; handle-attaching lugs on this piece; the balance of the dipper body being built of structural plate; and reinforcing means-on the back of the plate portion, extending from the heel piece to the rear part of the rim.

3. In -an excavating dipper, the combination of: an upper cast rim in two parts, the front part beingof ma'naganese steel, and the rear part being of carbon steel; aligned holes in overlapping portions of the two parts of the rim; a plug in one of these, aligned holes, secured to the part containing the other; means securing the two overlapping portions against prying apart; a digging lip on the'front part of the rim; handle-attaching lugs on the rear part of the rim; hoist-means-attaching lugs on the rim; a 'lower' rear hollow heel piece, extending. clear across the rear lower edge of the dipper; handleattaching lugs on this piece; thebalance of the dipper body being built of structural plate; and reinforcing means on the back of the plate po'rtion, extending from the heel piece to the rear part of the rim.

4. In. an excavating dipper, the combination of: an upper cast rim in two parts, the front part being of mang' wassee1matteaasae* inglug's ion the "rim; aflowr rear-hollow heel piece, extending clear across the rear lower edge of the dipper; handle-attaching lugs on this piece; the balance of the dipper body being built of structural plate; and reinforcing means on the backof the, plate -portion, extending from the heelpiece tothe rear part of the 5. Intan excavating dipper, the combination of: an-upper cast rim-in two parts, the front part parts of therim together, against sliding apart or prying apart; a digging lip on the front part being of manganese steel, and the rear part being of carbon steel; means for securing the two ofthe rim;-handle=attachingelugs ongthe' rear part of the rim; hoist-means at'taching lugs on the rim; a lower rear hollow heel piece, extending clear across the rear lower edge of the dipper; V

handle-attaching lugs on this piece; the bal ance of the dipper body being built of structural plate; and reinforcing means on, the back of the plate portion, extending from the heel piece to the rear part of the rim; each of the two rear' castings being of hollow box construction.

6. In an excavating dipper, the combination of an upper cast rim in two parts, the frontpart being of manganese steel, and the rear part being.

of carbon steel; means for securing the two parts of the rim together, against sliding apart or'prying apart; a digging lip on the front part of the rim; handle-attaching lugs on the rear part of the rim; hoist-means-attaehing lugs on the rim;

9. lower rear hollow heel piece, extending clear across the rear lower edge of the'dipper; handleattaching lugs on this piece; the balance of the dipperbody being built of structural plate; and" reinforcing means on the back of the plat tion. extending from the heel'piece to the rear} part of the rim; each reinforcingweb consisting of a channel welded to the back. I i

7. In an excavating dipper, the combination of: an upper cast rim-in two parts, the front part being of manganese steel, and the rear part being of carbon steel; means for seeming thetwo parts of the rim' together, against sliding apart or prying apart; a digginglip on the front'part of the rim; handle-attaching lugs on the rear of balance of the dipper body of-strucl tural plate; and reinforing meanson the back of the plate portion, "extendingfrom-theheel. V I

piece to the rear portion of the rim.- 1 8. In an excavating dipper, the combination of: an upper cast rim in two partspmeans for 'se-- curing the two'parts of therim together,against sliding apart or prying apart; a digging "lip onthe front'partof the rim; handle-attaching lugs on the rear' part of the hoist-means-attach ing lugs on the rear part of the rim; 9. lower rear hollow heel piece, extending clear across the rear lower edge of the dipper; handle-attaching lugs onthis piece; the balance of the dipper, bodybe ing built of structural plate; and reinforcing being of manganese steel, and the rear part being of .carbon steel; aligned holes in overlapping portions of the two parts of the rim; a plug in one of these aligned holes, secured to the part containing the other; means securing the two overlapping portions against prying apart; a digglng lip on the front part of the rim; handleattaching lugs on the rear part of the rim; hoistmeans-attaching lugs on the rear part of the rim; a lower rear hollow heel piece, extending clear across the rear lower edge of the dipper; handle-attaching lugs on this piece; the balance of the dipper body being built of structural plate; and reinforcing means on the back of the plate portion, extending from the heel piece to the rear portion of the rim.

10. A plug for joining the front and rear parts of the two-part cast rim of an excavating dipper against sliding apart, characterized by having a cylindrical portion, a frusto-conical portion, and a substantial axial cavity.

11. In an excavating dipper, the combination of: 'an upper cast rimin two parts, the front part being of manganese steel, and the rear part being of carbon steel; aligned holes in overlappingportions of the two parts of the rim; a plug in one of these aligned holes, secured to the part containing the other; means securing the two overlapping portions against prying apart; a digging lip on the front part of the rim; handle-attaching lugs on the rear part of the rim; hoist-means-attaching lugs on the rim; a lower rear hollow heel piece, extending clear across the rear lower edge of the dipper; handle-attaching lugs on this piece; the balance of the dipper body being built of structural plate; and reinforcing means on the back of the plate portion, extendingfromtheheelpiecetotherearpartofthe rim in several sizes.

rim; said plug characterized by having a cylindrical portion, making a close fit within a machined hole in the back part of the rim, and having a portion making a loose fit within a hole in the front part of the rim and welded thereto.

12. In anexcavating dipper, the combination of: an upper cast rim in two parts, the front part being of manganese steel, and the rear part being of carbon steel; aligned holes in overlapping portions of the two parts of the rim; a plug in one of these aligned holes, secured to the part means securing the two. .overlapping portions against prying apart; a

containing the other;

digging lip on the front part of the rim; handle-attaching lugs on the rear part of the rim;

hoist-means-attaching lugs on the rim; a lower rear hollow heel piece, extending clear across the rear lower edge of the dipper; handle-attach ing lugs on this piece; the balance of the-dipper body being built of structural plate; and reinforcing means on the back of the plate portion, extending from the heel piece to the rear part of the rim; the overlapping parts of the rim being substantial, so as to permit of assembling the 13. In an excavating dipper, the combination of: an upper cast rimin two parts; a plug, passing through aligned holes in overlapping portions of the two parts of the rim means securing the two overlapping p tions against prying apart; a digding lip on the front part of the rim; handleattaching lugs on the rear. part of the rim; a hoist-means attaching lug aligned with the plug; a lower rear hollow heel piece, extending clear across the rear lower edge of the dipper; handleattaching lugs on this piece; the balance of the dipper body being built of structural plate; and reinforcing means on the back of the plate portion, extending from the heel piece to the rim.

. WILLIAM M. BAGER.

MITCHELL L. FYKSE. GEORGE W. MORK. 

